Author Topic: Dry clutch on CB750 (Read 131739 times)

ColinMc · « **Reply #50 on:** October 27, 2009, 08:05:31 PM »

mmmm, now that's motorcycle porn. I think that should be marked "Not Safe For Work"

bucky katt · « **Reply #51 on:** October 27, 2009, 09:04:47 PM »

time for a dumb question..............will we still be able to use our kickstarters?

J.Webster Designs · « **Reply #52 on:** October 28, 2009, 07:49:25 AM »

so from what i understand.... the pros listed so far are:

1) ease of clutch R/R
2) a cool noise......
3) being able to use better oils in the motor without hurting clutch packs. (slipping, etc..)
4) better torque handling (higher friction coefficient)
5) no more clutch fiber in the oil
6) reduced mass allowing quicker throttle response.

Anyone have anything else to add?

Would this dry clutch system you are making be able to be streetable? not necessarily daily driven, but on nice days out through town and for some frisky back road driving?

voxonda · « **Reply #53 on:** October 28, 2009, 08:03:08 AM »

Quote from: bucky katt on October 27, 2009, 09:04:47 PM

time for a dumb question..............will we still be able to use our kickstarters?

Yes, you can.

voxonda · « **Reply #54 on:** October 28, 2009, 08:05:04 AM »

Quote from: midnight08 on October 28, 2009, 07:49:25 AM

so from what i understand.... the pros listed so far are:

1) ease of clutch R/R
2) a cool noise......
3) being able to use better oils in the motor without hurting clutch packs. (slipping, etc..)
4) better torque handling (higher friction coefficient)
5) no more clutch fiber in the oil
6) reduced mass allowing quicker throttle response.

Anyone have anything else to add?

Would this dry clutch system you are making be able to be streetable? not necessarily daily driven, but on nice days out through town and for some frisky back road driving?

Have to wait and see, but why not. Ducati does it, and so did many others. Take it in consideration that a dry clutch 'bites' more than an oiled one.

Rob

J.Webster Designs · « **Reply #55 on:** October 28, 2009, 08:23:59 AM »

Quote

Have to wait and see, but why not. Ducati does it, and so did many others. Take it in consideration that a dry clutch 'bites' more than an oiled one.

Not having ever ridden a Ducati or anything with a dry clutch for that matter... im guessing that when you say they 'bite' more, that clutch manipulation is a bit tricky? I have read that dry clutches can be "finicky".

ColinMc · « **Reply #56 on:** October 28, 2009, 09:07:11 AM »

The problem is you can't slip the clutch on a dry clutch bike like on a wet one. So getting going from a start until you get used to it can be herky jerky. Same goes for slow speed parking lot stuff. It just takes some getting used to is all. My Ducati has a full blown race slipper clutch, friction plates etc...and it is weird to hop on right after riding something else but easy to get used to.

simon#42 · « **Reply #57 on:** October 28, 2009, 11:26:59 AM »

Quote from: ColinMc on October 28, 2009, 09:07:11 AM

The problem is you can't slip the clutch on a dry clutch bike like on a wet one.

not sure i agree with this colin, the reason 125 and 250 gp bikes have dry clutches is because you can slip them . in the days before power valves and clever ignitions we had to slip the clutch out of every slow corner

ColinMc · « **Reply #58 on:** October 28, 2009, 12:08:31 PM »

I should have worded that differently. You CAN slip the clutch but it is much more difficult to do from a standstill to get going. Well not even much more difficult. Just different lol.

lordmoonpie · « **Reply #59 on:** October 28, 2009, 12:58:55 PM »

Not I have to agree with everything Simon #42 says but us Simon's are usually right

I can slip the dry clutch on my 888 Ducati just fine and could do the same on my old 50cc Kriedler GP bike and the three RS250 Hondas I had. It slips great but when it does bite, it bites well. I kind of understand what Colin's trying to say but it's diffcult to put into words. But yes, it can be used every day rain or shine, no issues...

J.Webster Designs · « **Reply #60 on:** October 28, 2009, 01:03:40 PM »

sounds interesting. i may have to talk to my garage neighbor about it as he has a Ducati 1098.

lordmoonpie · « **Reply #61 on:** October 29, 2009, 01:35:50 AM »

Quote from: midnight08 on October 28, 2009, 01:03:40 PM

sounds interesting. i may have to talk to my garage neighbor about it as he has a Ducati 1098.

Ooo nice! Don't talk to him - ask him to lend it to you to try it out!

J.Webster Designs · « **Reply #62 on:** October 29, 2009, 04:55:38 AM »

hahaha... he is a strange one... i have talked to him on several occasions as he has seen the build up of my bike and is extremely interested in it. He is actually going to sell his 1098 to get a harley............. not sure of the model but i think he was talking about getting a fat boy. although he does have a speed triple that he uses as a DD.

ColinMc · « **Reply #63 on:** October 29, 2009, 06:30:35 AM »

Arg! Selling his 1098...for a Harley?! That's like trading a Ferrari for a Hyundai...it'll still get you to where you want to go, but you'll always miss the Ferrari.

In all fairness I had a 1098s for about 6 months and sold it. Personally I like my 748/996 better. So I had no need for the 1098s anymore. It was an awesome bike but I had a chance to make money on a bike I got to ride for 6 months and enjoy so I jumped on it.

J.Webster Designs · « **Reply #64 on:** October 29, 2009, 08:40:47 AM »

i am attributing him selling all his stuff due to this new girlfriend that started showing up.... he had a nice corvette as well. ended up selling it for a mazda CX-9.... I made sure that when i proposed to my girlfriend that she understands the fact that i will have toys throughout my life and that i will not sell them just because she says to. now if there is necessary for me to sell something.. that is a different story.

voxonda · « **Reply #65 on:** October 30, 2009, 05:59:14 AM »

WATCH YOUR SCREENS TODAY!

J.Webster Designs · « **Reply #66 on:** October 30, 2009, 07:44:59 AM »

im watching intently........

voxonda · « **Reply #67 on:** October 30, 2009, 09:07:20 AM »

This is it! Let me know what you think.

Will build it in a test bike shortly and take it out on the road, a minor thing has to be sorted but IMHO it is way COOL!!

Rob

ColinMc · « **Reply #68 on:** October 30, 2009, 09:27:42 AM »

Rob,

Awesome, just awesome! Can't wait to find out how well it works and more importantly let me know when I can buy one

mec · « **Reply #69 on:** October 30, 2009, 09:35:31 AM »

looks good.
do you think it can handle the power of my 1000ccm as well?

mec

bucky katt · « **Reply #70 on:** October 30, 2009, 09:43:41 AM »

i'd use it on my street bike just for the wow factor.

j-conn · « **Reply #71 on:** October 30, 2009, 09:44:07 AM »

way cool

voxonda · « **Reply #72 on:** October 30, 2009, 09:46:27 AM »

Quote from: mec on October 30, 2009, 09:35:31 AM

looks good.
do you think it can handle the power of my 1000ccm as well?

mec

When all is well on the road we'll test it in a CR836 with everything onboard, we'll see but cannot imagine why not. A clutch like this could handle GSX-R and GS1000 Endurance racers so think it will do the job.

Rob

ColinMc · « **Reply #73 on:** October 30, 2009, 10:09:13 AM »

On a serious side note, what are your plans for making more/selling? Also what clutch plates are you using? I'm assuming that you have to use plates that are meant to be dry? I know the plates on my Ducati are fairly similar looking to the plates on my other bikes...but the material must be different?

mmmm lekker koppeling!

turboguzzi · « **Reply #74 on:** October 30, 2009, 10:27:04 AM »

compliments! looks very nice, good work!

casting of the cover is zer cool indeed

when are you starting work on a 500/550 version?

TG

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Author Topic: Dry clutch on CB750 (Read 131739 times)